 /*******************************************************************************
  * Copyright (c) 2007 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  ******************************************************************************/

 package org.eclipse.ui.internal;

 import org.eclipse.core.commands.AbstractHandler;
 import org.eclipse.core.commands.HandlerEvent;

 /**
  * Abstract base class that provides the enabled state, where changing the state
  * fires the HandlerEvent.
  *
  * @since 3.3
  */
 public abstract class AbstractEnabledHandler extends AbstractHandler {

     private boolean enabled = true;

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.core.commands.AbstractHandler#isEnabled()
      */
     public boolean isEnabled() {
         return enabled;
     }

     protected void setEnabled(boolean isEnabled) {
         if (enabled != isEnabled) {
             enabled = isEnabled;
             fireHandlerChanged(new HandlerEvent(this, true, false));
         }
     }
 }

